Official NHA Assessment
Race 5: MERIT RATED 80 HANDICAP (Open)
Line Horse
Karvani
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
2 / 6
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Masaaken (AUS) 4 61.5 1 0.00 0.5 83 77 83 +0 2 Karvani 7 55.5 2 2.00 0.0 71 71 71 +0 3 Obscure 4 60.0 3 3.75 0.5 80 76 76 -4 4 Magic Vision 5 53.0 4 6.25 0.0 66 61 61 -5 5 Jubilee 7 60.0 5 22.25 0.0 80 75 75 -5 99 Wild Heritage 5 55.5 99 0.00 0.0 - 66 66 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Masaaken (AUS) | 83 | 92 | 83 | +9 | 0.5 | - | |
| 2 | Karvani Line | 71 | 73 | 71 | +2 | 0.0 | ||
| 3 | Obscure | 80 | 87 | 76 | +11 | 0.5 | - | |
| 4 | Magic Vision | 66 | 64 | 61 | +3 | 0.0 | - | |
| 5 | Jubilee | 80 | 72 | 75 | -3 | 0.0 | - | |
| 99 | Wild Heritage | - | 71 | 66 | +5 | 0.0 | - |
Assessment Methodology
Calculation Steps:
- Identify Line Horse - consistent performer used as reference
- Calculate WFA Allowance based on age, distance, and month
- Apply Drag Adjustment for beaten margin
- Calculate Actual Weight Performance:
Weight - Drag - WFA - Compare to Line Horse to determine race rating
- Apply special rules (maiden caps, layoff allowance)
Key Formulas:
- Drag Effect: Varies by distance (see Benchmarks page)
- 1 length ≈ 1kg at 1 mile (1600m)
- WFA Scale: Based on Admiral Rous's 1855 table
- Rating Points: 1kg = 2 rating points